Fatal error: Uncaught TypeError: Argument 1 passed to wp_register_font_collection() must be of the type string, array given, called in /htdocs/wp-content/plugins/gutenberg/lib/experimental/fonts/font-library/font-library.php on line 136 and defined in /htdocs/wp-includes/fonts.php:78 Stack trace: #0 /htdocs/wp-content/plugins/gutenberg/lib/experimental/fonts/font-library/font-library.php(136): wp_register_font_collection(Array) #1 /htdocs/wp-content/plugins/gutenberg/lib/load.php(146): require('/htdocs/wp-cont...') #2 /htdocs/wp-content/plugins/gutenberg/gutenberg.php(73): require_once('/htdocs/wp-cont...') #3 /htdocs/wp-content/plugins/gutenberg/gutenberg.php(20): gutenberg_pre_init() #4 /htdocs/wp-settings.php(517): include_once('/htdocs/wp-cont...') #5 /htdocs/wp-config.php(77): require_once('/htdocs/wp-sett...') #6 /htdocs/wp-load.php(50): require_once('/htdocs/wp-conf...') #7 /htdocs/wp-blog-header.php(13): require_once('/htdocs/wp-load...') #8 /htdocs/index.php(17): require('/htdocs/wp-blog...') #9 {main} thrown in /htdocs/wp-includes/fonts.php on line 78